#pragma once  

#define SIZE 4096
#define FLUSH_NONE 1
#define FLUSH_LINE (1<<1)
#define FLUSH_ALL  (1<<2)

typedef struct _myFILE
{
    int fileno;             // 文件描述符
    int flag;               // 
    char buffer[SIZE];      // 缓冲区
    int end;                // 
}myFILE;


extern myFILE *my_fopen(const char *path, const char *mode);
extern int my_fwrite(const char *s, int num, myFILE *stream);
extern int my_fflush(myFILE *stream);
extern int my_fclose(myFILE*stream);
